EP1662460A2 - Indicateur optique d'une limite horaire et procédé destiné à la fabrication de l'indicateur optique - Google Patents

Indicateur optique d'une limite horaire et procédé destiné à la fabrication de l'indicateur optique Download PDF

Info

Publication number
EP1662460A2
EP1662460A2 EP05025321A EP05025321A EP1662460A2 EP 1662460 A2 EP1662460 A2 EP 1662460A2 EP 05025321 A EP05025321 A EP 05025321A EP 05025321 A EP05025321 A EP 05025321A EP 1662460 A2 EP1662460 A2 EP 1662460A2
Authority
EP
European Patent Office
Prior art keywords
dye
optical display
end point
point according
dyes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05025321A
Other languages
German (de)
English (en)
Other versions
EP1662460A3 (fr
Inventor
Andreas Günther Georg Schott
Liselotte Lepinat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1662460A2 publication Critical patent/EP1662460A2/fr
Publication of EP1662460A3 publication Critical patent/EP1662460A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0283—Forms or constructions food-compatible or edible

Definitions

  • the invention relates to an optical display of a time end point and a method for producing the optical display.
  • an optical display of a time endpoint in particular a durability mark, is provided, which contains a dye which expands on a support material or migrates on it in one direction and with its extent or location on the ground gives an easily visible signal as to whether the shelf life limit or the predetermined end date has been reached.
  • durability mark is used for the explanation of the invention.
  • durability sign should always also include an optical indication of a time end point in the general form, so that this term is not to be understood as limiting.
  • the durability mark according to the invention it is now possible to easily recognize whether the durability limit or the predetermined end time has been reached, or whether it is approaching soon.
  • older people who are no longer able to read well or even children who are still too young to read or to understand the content of what they have read can find it easier Recognize whether they may still use a food or a means of use.
  • the durability mark according to the invention also makes it easier for the sales staff because it can check or sort entire pallets at a glance. The customer is also made easier to choose when shopping.
  • this visually recognizable durability indicator facilitates the overview in the domestic refrigerator. It can be seen at a glance which products are approaching the expiry date and thus can sort and consume or dispose of its goods better and more clearly.
  • an optical color durability mark for food or other perishable goods has been created, which can be used, for example, in addition to the known from the prior art stamps with the expiration date.
  • the invention further relates to a method for producing an optical display of a time end point, which is characterized in that the loading of the carrier material with the dye and / or the solvent takes place in a temporal relationship with the production of a product provided with the optical display.
  • the dye or a solvent for the dye is applied to the support material during production, or immediately before or immediately afterwards.
  • FIG. 1 shows part of a durability mark 1 in strip form. At the left end 2, a dye 3 is visible, which is located on a substrate 4, which extends over the entire length of the strip. On one side of the durability mark 1 is a scale 5.
  • a space is provided which can accommodate a certain amount of the dye and / or the solvent.
  • FIG. 1a the same durability mark 1 is shown, in which the dye 3 has already moved to the right on the carrier material 4.
  • Figure 2 shows a cross-section through an alternative embodiment of the durability mark 1.
  • the material of the durability mark 1 has a thickness which allows the dye 3 on the substrate 4 to migrate from the side facing away from the viewer to the side facing the viewer can.
  • the durability mark 1 comprises a carrier material 4 on which a dye is located.
  • the dye 3 is located at one end 2 of the durability mark 1.
  • the support material 4 is a substance which allows migration of the dye 3 on its surface when a liquid is applied to the dye 2 or when the dye itself is liquid or in liquid form since it is already solvated.
  • Typical materials which can be used as carrier material 4 are therefore carrier materials which are used in chromatography.
  • B. C 12 to C 20 , in particular C 18 as an example of reversed-phase surfaces or mixtures thereof, such as Teflon or polyethylene which contains silicate.
  • a gel for example, dextran, agarose and polysaccharide can be used.
  • textiles such as natural or synthetic fibers, paper, cardboard or cardboard are used.
  • the carrier material can be present as a powder, pearled powder or gel on a support such as glass, plastic, aluminum or another metal.
  • the carrier material may optionally comprise a binder. This contributes to the formation of a layer of the carrier material which adheres to the carrier.
  • the binder may include gypsum, silicic acid, polyacrylic acids or salts thereof, polyvinylpyrrolidone and polyvinyl alcohols.
  • the dye 3 preferably at one end 2, is applied.
  • a dye 3 in the context of the invention is basically any substance to understand, which has a color, including black and white.
  • the decisive factor is that the dye differs optically from its background.
  • dyes which are clearly visible. Furthermore, they should have the highest possible extinction.
  • luminescent dyes especially fluorescent dyes, for example neon paints or daylight paints, since these are particularly noticeable.
  • the dye is photochemically stable.
  • the dye 3 should be non-toxic and satisfy food law requirements.
  • Anthocyanins alizarin, litmus, aniline dyes, azo dyes, azine dyes, anthraquinone dyes, oxazine dyes, thiazine dyes, triarylmethane dyes, aminotriarylmethane dyes, hydroxytriphenylmethane dyes, eosin, rhodamine, methylene blue, cresyl violet, fluorescene, perylene, potassium permanganate, congo red, naphthol AS dyes, metal complex azo dyes, acridines, xanthenes , Thioxanthene, pyrenes, acridine orange, tetracyclines, porphyrins, betalaine, bluewood, chlorophyll, chochenille, turmeric, hemoglobin, indigo, kermes, madder, orlean, orseille, purple, safflower, aniliblau, aniline black, anth
  • the dye 3 may be a solid or a liquid or a dye dissolved in a solvent.
  • the dye 3 is a liquid, it is not necessary to add another liquid, but it is possible.
  • the dye 3 is a solid, then a certain amount of liquid is added to the dye.
  • the dye 3 itself is a liquid which may be added with another liquid, it migrates through the support material 4 due to capillary forces and surface forces, as it does in chromatography, or expands its surface.
  • the dye 3 is a solid, it migrates through the liquid either dissolved or undissolved on or through the carrier material 4 and changes its position or expands its surface.
  • the liquid can be applied over the entire length or extent of the durability mark 1 or at least a part thereof.
  • the dye 3 migrates by diffusion and changes its position or surface area.
  • liquids all possible liquids come into consideration, but they should be non-toxic or particularly preferably satisfy food law requirements.
  • glycerol polyethylene oxide
  • PCL poly- ⁇ -caprolactone
  • the combination of carriers, dyes and solvents used depends on the period of time that is relevant for the determination of the end date. If the expiry time is short, a solvent is chosen which dissolves the dye well. For this purpose, the elutrope series can be used. If a long period is to be marked, a solvent is chosen which dissolves the dye less well or not well. For fast drain times, the support material and the dye have a different polarity or a weak adsorptive interaction, for long run times they have a similar or the same polarity or strong adsorptive interaction. The same laws apply as for chromatography, in particular thin-layer chromatography, gel permeation chromatography and column chromatography.
  • the migration rate also depends on the viscosity and the surface tension of the dye and the solvent, the contact angle between the carrier substance and Solvent or dye or between the vehicle and the mixture of solvent and dye. Furthermore, the migration rate also depends on the permeability of the support material and in particular on the size and number of pores present and optionally on the binder used and on the mean particle size of the particles of the support material.
  • the expiration time can be increased and the migration rate can be reduced by changing the parameters just described, even if the support material and the dye have a different polarity or a weak adsorptive interaction and / or if the solvent dissolves the dye well or very well.
  • the permeability constant of the support material depends inter alia on the size and the number of pores present and, where appropriate, on the binder used.
  • the mean particle diameter of the carrier material may be, for example, between 1 nm and 20 .mu.m, preferably between 1 nm and 100 nm, more preferably between 100 nm and 7 .mu.m or between 7 .mu.m and 20 .mu.m.
  • the smaller the average diameter of the particles of the carrier material used the lower the migration rate of the dye, the solvent and / or the mixture of dye and solvent.
  • the greater the average diameter of the particles of support material used the greater the rate of migration of the dye, solvent, and / or dye / solvent mixture.
  • the surface tension may be from 1 to 100 mN / m, preferably from 1 to 50 mN / m and particularly preferably from 1 to 30 mN / m. Further, increasing the viscosity of the dye, solvent, and / or dye and solvent mixture reduces the rate of migration of the dye, the solvent and / or the mixture of dye and solvent.
  • the viscosity of the dye, the solvent and / or the mixture of dye and solvent for example between 0.1 mPa.s and 100,000 mPa.s, preferably between 50 mPa.s and 10,000 mPa.s and more preferably between 100 mPa .s and 70000 mPa.s.
  • the increase in the contact angle between the carrier material and solvent or dye or between the carrier material and the mixture of solvent and dye to increase the migration rate of the dye, the solvent and / or the mixture of dye and solvent for example between 0.1 mPa.s and 100,000 mPa.s, preferably between 50 mPa.s and 10,000 mPa.s and more preferably between 100 mPa .s and 70000 mPa.s.
  • the increase in the contact angle between the carrier material and solvent or dye or between the carrier material and the mixture of solvent and dye to increase the migration rate of the dye, the solvent and / or the mixture of dye and solvent.
  • a reduction in the contact angle between the carrier material and solvent or dye or between the carrier material and the mixture of solvent and dye leads to the reduction of the migration speed of the dye, the solvent and / or the mixture of dye and solvent.
  • the contact angle can be influenced both by the selection of the solvent biziehungweise of the dye and by the selection of the carrier material.
  • the contact angle can be achieved by using a hydrophobic carrier material such as silicate Teflon, silicate polyethylene, a polyamide or a fluorinated polyamide, a polyester or a fluorinated polyester or a polyester Silicates with alkyl coating or Fluoralkylbe Anlagen be reduced.
  • Particularly preferred according to the invention are mixtures of a solvent and a dye which have a retention factor (R f ) of 1 or approximately 1.
  • R f retention factor
  • the dye 3 is distributed over the entire surface of the carrier material 4, or the applied dye 3 migrates over the carrier material 4 in a moving strip, as in chromatography, which is known as the separation method.
  • the expiration date or any other date relevant as a determination date will be indicated by the complete staining or staining to a marked end point of the shelf life mark 1.
  • the relevant date can be recognized by the fact that the dye 3 has arrived at the other end 2 of the shelf-life mark 1 or has reached its edge or another marked spot.
  • the dye 3 is applied in an analogous manner to the back of the durability mark 1. He then wanders to the surface, which the Viewer is facing. The expiration date is then indicated by the visibility of Dye 3.
  • the surface of the durability mark 1 may be adjacent to a color pattern which is colored with the hue corresponding to the end date, so that the expiration date can be better recognized.
  • the dye 3 may be applied on the side facing away from the observer so that it represents a number or a month as a date. If the dye 3 passes through the carrier material 4, the end date appears on the surface on the side facing the observer, so that it can be read in addition to the color effect associated therewith.
  • the migration of the dye can also be effected by capillaries, which are either parallel to the side facing the viewer, or extend from the side facing away from the viewer to the side facing the viewer.
  • capillaries may be made of glass fiber or plastic fiber and are preferably transparent.
  • the durability mark 1 is formed as a label, which can be glued to the object to be marked.
  • adhesives such as adhesives or Velcro can be used.
  • the durability mark 1 is formed as a strip. This is preferably applied to the dye at one end.
  • the durability mark 1 has a scaling, which may include time units so that the temporal progression can be followed quantitatively or semiquantitatively.
  • the geometry of the durability mark 1 may also differ from the strip shape.
  • other shapes are conceivable, such as a circular surface, wherein the dye 3 is either applied to the side facing away from the viewer and moves upwards over time, so that it is visible, or the dye 3 is in the middle and migrates outwards, creating either a full colored dot or an expanding circle.
  • the durability mark 1 may be configured as a circular possibly interrupted web or spiral path or as a serpentine line. The dye 3 migrates from a starting point around the circle to the starting point or until the interruption of the circle or to the end point of the spiral or to the end of the serpentine line.
  • the embodiments just mentioned offer the possibility of applying a long distance of the carrier material to as small a surface as possible.
  • the durability mark 1 is at least partially coated with a liquid-impermeable layer, such as a transparent plastic film or a transparent plastic resin so that the liquid or the dye 3 can not evaporate and the dye transport not by evaporation of the liquid or the dye itself is prevented.
  • a liquid-impermeable layer such as a transparent plastic film or a transparent plastic resin
  • the layer which is impermeable to the liquid may be located on the upper side and / or on the underside and / or on at least one edge of the durability mark 1.
  • the durability mark 1 is produced in time with the production of the goods, so that - due to the procedures in the production of the durability mark 1 - normalized conditions are ensured when marking the goods. It is important that the dye 3 and / or the liquid is applied to the carrier material 4 at the time from which the disintegration or expiration date is to be measured, in particular at the time of manufacture or immediately after production. It is particularly advantageous to bring the mixture of solvent and dye with a portion of the support material at this time by application, for example by injection or by dropping into contact.
  • the contact can come about, for example, through an opening in the cover, which is later optionally closed as needed. Alternatively, the contact can also be made before the cover of the carrier material.
  • the color strip When the product is packaged, the color strip is short, and the farther the date of expiration approaches, the strip expands in the color of choice to each clearly visible, as in a scale, so that one recognizes at first glance, how long the product is still tough.
  • This scale is divided into days, weeks or months, depending on the product and expiry date.
  • the web of the carrier material may be partially concealed on or through which the dye, the solvent or the mixture of dye and solvent migrates.
  • the optical indication of a time endpoint may thereby be made only in the 25, 20, 15, 10, or 5 last days of the shelf life period so as not to prevent a potential consumer from buying at the beginning of the shelf life to discourage an older product and, nevertheless, to alert it to the remaining shelf life of the product when it comes to maturity. Since the distance traveled by the dye, the solvent or the mixture of dye and solvent decreases with time as the time progresses, and the distance traveled per unit of time is therefore at its beginning, a potential consumer may prefer to buy a product.
  • the path traveled by the dye, solvent or mixture of dye and solvent is much smaller compared to another product, without the remaining shelf life of the two products being different in proportion to the difference in the paths traveled.
  • the potential consumer might be tempted to prefer only slightly earlier manufactured products to slightly later manufactured products.
  • the masking of at least part of the web of the carrier material, onto or through which the dye, the solvent or the mixture of dye and solvent migrates makes sense so as not to confuse the consumer.
  • the visual indication of a temporal endpoint according to the invention is preferably applied above the product description so that it is easily recognizable.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP05025321A 2004-11-26 2005-11-21 Indicateur optique d'une limite horaire et procédé destiné à la fabrication de l'indicateur optique Withdrawn EP1662460A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410057285 DE102004057285A1 (de) 2004-11-26 2004-11-26 Optische Anzeige eines zeitlichen Endpunktes

Publications (2)

Publication Number Publication Date
EP1662460A2 true EP1662460A2 (fr) 2006-05-31
EP1662460A3 EP1662460A3 (fr) 2006-11-02

Family

ID=36061386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05025321A Withdrawn EP1662460A3 (fr) 2004-11-26 2005-11-21 Indicateur optique d'une limite horaire et procédé destiné à la fabrication de l'indicateur optique

Country Status (2)

Country Link
EP (1) EP1662460A3 (fr)
DE (1) DE102004057285A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109767688A (zh) * 2019-03-06 2019-05-17 武汉工程大学 一种监控食品氧化程度的颜色指示标签及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012110571A1 (de) * 2012-11-05 2014-05-08 Christian Lenz Einrichtung für Produkte insbesondere für Arzneimittel und/oder Nahrungsmittel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0815251A (ja) * 1994-07-01 1996-01-19 Advance Co Ltd 食品鮮度状態表示体
US5555223A (en) * 1992-02-20 1996-09-10 Barainsky; Markus Consumer item
JPH11248550A (ja) * 1998-02-26 1999-09-17 Toshiba Tec Corp 温度管理部材
DE10021313A1 (de) * 2000-05-02 2001-11-08 Ludwig Hoegl Verpackung zur Aufbewahrung von Lebensmitteln mit einem Haltbarkeitsindikator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5555223A (en) * 1992-02-20 1996-09-10 Barainsky; Markus Consumer item
JPH0815251A (ja) * 1994-07-01 1996-01-19 Advance Co Ltd 食品鮮度状態表示体
JPH11248550A (ja) * 1998-02-26 1999-09-17 Toshiba Tec Corp 温度管理部材
DE10021313A1 (de) * 2000-05-02 2001-11-08 Ludwig Hoegl Verpackung zur Aufbewahrung von Lebensmitteln mit einem Haltbarkeitsindikator

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 1996, Nr. 05, 31. Mai 1996 (1996-05-31) & JP 08 015251 A (ADVANCE CO LTD; others: 01), 19. Januar 1996 (1996-01-19) *
PATENT ABSTRACTS OF JAPAN Bd. 1999, Nr. 14, 22. Dezember 1999 (1999-12-22) & JP 11 248550 A (TOSHIBA TEC CORP), 17. September 1999 (1999-09-17) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109767688A (zh) * 2019-03-06 2019-05-17 武汉工程大学 一种监控食品氧化程度的颜色指示标签及其制备方法

Also Published As

Publication number Publication date
DE102004057285A1 (de) 2006-06-08
EP1662460A3 (fr) 2006-11-02

Similar Documents

Publication Publication Date Title
DE2649701A1 (de) Warnzeichen
DE2445379C2 (de) Chemische Zeitanzeigevorrichtung
DE2431667C3 (de) Thermometrisches Element
DE102010013040B4 (de) Etikett zum Aufkleben auf einen Behälter für eine Medikamentenflüssigkeit und Behälter
DE2715752C2 (fr)
DE69535589T2 (de) Temperaturanzeigevorrichtung und Zusammensetzung zur Verwendung darin
DD143379A3 (de) Indikatorroehrchen zur glukosebestimmung
DE3545813A1 (de) Reversible temperaturanzeigezusammensetzung
DE2047319B2 (de) Verfahren und mittel zum bedrucken von behaelterverschluessen mit einer markierungssubstanz
EP0835429A1 (fr) Indicateur de temperature pour produits refrigeres ou similaire
DE2729711A1 (de) Verfahren und vorrichtung zur bestimmung des sterilisierungsgrades
DE1598818A1 (de) Trockene Indikatorzubereitung zur Bestimmung von Protein in Fluessigkeiten
DE1698092B2 (de) Temperaturempfindliche anzeigevorrichtung
DE1189289B (de) Vorrichtung zum Aufzeichnen und/oder Anzeigen von Leuchtinformationen unter Verwendung von auf einer Schirmflaeche aufgebrachten photochromen Farbstoffen
EP1662460A2 (fr) Indicateur optique d'une limite horaire et procédé destiné à la fabrication de l'indicateur optique
DE102011075667A1 (de) Verpackung
DE602004008079T2 (de) Authentifizierbare Kosmetikverpackungsvorrichtung
DE102012104460A1 (de) Überrundumetikett zum Umkleben des Umfangs eines Gegenstandes
EP1882919B1 (fr) Indicateur de temps-température destiné au marquage de marchandises
AT520591B1 (de) Sensortinte, Verfahren zur Herstellung eines Fluoreszenzsensors mit der Sensortinte sowie Sensor
BE1028815B1 (de) Zeit-temperatur-aussetzungsindikator mit verzögerter schwellenreaktion
WO1989000680A1 (fr) Dispositif indicateur de la position d'un fluide qui se repand dans un corps
DE2327723C2 (de) Reversibles thermochromatisches Material
DE19907045C2 (de) Indikatoretikett
DE19610983C2 (de) Einrichtung zum Nachweis von Ozon und Verfahren zu dessen Herstellung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20070502

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20070618

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20081007